There are Many free Slicers that support many different supports.
here are the 20 Best
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all3dp.com]
I use Cura, Idealmaker, MatterControl, Meshmixer, Netfabb and Slic3r.
All Free be careful, sometimes switching Slicers causes my 3D Printers "3DD11/3DP12" to be reconfigured by the slicers and I have to restore factory defaults to correct.
M502 ; Restore Factory
M500 ; Store Settings
Meshmixer has a Manual install support, Select where to start and stop supports.